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Diffusion tensor imaging (DTI) is a magnetic resonance imaging technique that enables the measurement of the restricted diffusion of water in tissue in order to produce neural tract images instead of using this data solely for the purpose of assigning contrast or colors to pixels in a cross-sectional image.
This shape is often modeled as an ellipsoid, and the technique is then called diffusion tensor imaging. [4] Barriers can be many things: cell membranes, axons, myelin, etc.; but in white matter the principal barrier is the myelin sheath of axons. Bundles of axons provide a barrier to perpendicular diffusion and a path for parallel diffusion ...
A Diffusion Ellipsoid is completely represented by the Diffusion Tensor, D. FA is calculated from the eigenvalues of the diffusion tensor. [1] The eigenvectors give the directions in which the ellipsoid has major axes, and the corresponding eigenvalues give the magnitude of the peak in each eigenvector direction.
Diffusion tensor imaging, a structural medical imaging technique; Direct thrombin inhibitor; Diesel turbo injection, a brand name for common rail; Direct tension indicator; Deep tissue injury, see suspected deep tissue injury in List of medical abbreviations: S; Dye transfer inhibitor
However, DTI had a major limitation in resolving axons from different tracts intersected and crossed en route to their target. In 2009, Learning Research & Development Center (LRDC) at University of Pittsburgh launched the 2009 Pittsburgh Brain Competition [ 7 ] to invite the best research team to work on this problem. [ 8 ]
1 Diffusion tensor imaging. Toggle the table of contents. Wikipedia: ... Promoted Image:DTI-sagittal-fibers.jpg MER-C 07:03, 2 November 2007 (UTC)
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One group of researchers (Iturria-Medina et al., 2008) [35] has constructed connectome data sets using diffusion tensor imaging (DTI) [36] [37] followed by the derivation of average connection probabilities between 70 and 90 cortical and basal brain gray matter areas. All networks were found to have small-world attributes and "broad-scale ...